Leibish Buys a Quarter of Diamonds at Argyle Tender December 31, 20 by John Jeffay (IDEX Online) - Leibish Polnaur, veteran of the color diamond market, bought a quarter of the stones at Argyle's record-breaking tender. He outbid rivals for 16 of the 62 gems in the penultimate sale, marking the closure of the iconic mine, in Australia, after 37 years. Mr Polnaur, founder of Israel-based Leibish, said asking prices 15 per cent higher than last year so he upped his bids by "20 per cent a nd more". He named his 2020 tender cache the Pink Sunset Collection (pictured) in homage to Argyle's last days. A stand-out is Lot 3, the Argyle Sakura, a 1.84 carat pear-shaped fancy vivid purplish pink stone.